In this paper some results of a study among psychiatric patients in a large mental hospital in the Netherlands are presented. We focus on the following issues: - the religious and spiritual beliefs and activities of the inpatients; - both the positive and the negative influence of their religion and their religious coping on their mental problems as well as on their existential well-being. The results are discussed briefly within the theoretical notions of religious coping, adressing the positive influence especially (...) of religious beliefs, relying on God and religious social support in psychological and existential times of crisis. (shrink)